26319487440 has 80 divisors (see below), whose sum is σ = 81622775808. Its totient is φ = 7015746048.

The previous prime is 26319487421. The next prime is 26319487471. The reversal of 26319487440 is 4478491362.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 26319487440.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 624474 + ... + 665286.

Almost surely, 2^26319487440 is an apocalyptic number.

26319487440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26319487440 is an abundant number, since it is smaller than the sum of its proper divisors (55303288368).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

26319487440 is a wasteful number, since it uses less digits than its factorization.

26319487440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43516 (or 43510 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 48.

The spelling of 26319487440 in words is "twenty-six billion, three hundred nineteen million, four hundred eighty-seven thousand, four hundred forty".